Note: (1)Wheel adapters must fit closely against the vehicle hub. Before installation, thoroughly clean off any rust and dirt on the wheel hub. (2)Check for any damage or cracks in the brake discs and vehicle hub.(3)Not for towing(5)Tighten the bolt to a torque of 110-150 N·m.(6)Non-original wheels need to be checked for correct specifications Specification: Bolt Pattern: 8x170, Hub Bore: 125mm, Thickness: 2"(50.8mm), Stud: M14x1.5, Quantity: 2 x Wheel Adapters Fitment: Compatible with Ford 2003-2005 Excursion, 2003-2009 F250, 2003-2022 F250 Super Duty, 2003-2009 F350, 2011-2016 F350, 2003-2022 F350 Super Duty. Quality: AEagle wheel spacers & adapters are precision-manufactured using CNC machining from forged 6061-T6 aluminum. Grade 10.9 heat-treated high-strength bolts provide excellent lateral tensile strength. Warranty: AEagle's Wheel Adapters undergo rigorous testing and come with a 1-year warranty and replacement. Compatible with Ford: for Excursion 2003-2005 for F250 2003-2009 for F250 Super Duty 2003-2022 for F350 2003-2009 & 2011-2016 for F350 Super Duty 2003-2022 Installation Advice: --Even compatible vehicles should have their specifications checked. --Before installation, thoroughly clean off any rust and dirt on the wheel hub. Check for any damage or cracks in the brake discs. --When selecting a spacer, the thickness should be less than the minimum fender gap. --After first installing, drive for 45 miles and check the tightness of the nuts once. Then, check them every 2,000 miles. --If you lack experience in installing Wheel adapters & spacers for the first time, it is advisable to seek assistance from a professional to ensure proper installation. Specification Bolt Pattern: 8x170 Hub Bore: 125mm Thickness: 2"(50.8mm) Stud: M14x1.5 Quantity: 2 x Wheel Adapters